811047617 has 2 divisors, whose sum is σ = 811047618. Its totient is φ = 811047616.

The previous prime is 811047607. The next prime is 811047649. The reversal of 811047617 is 716740118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803779201 + 7268416 = 28351^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 811047617 - 2²⁴ = 794270401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (811047607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405523808 + 405523809.

It is an arithmetic number, because the mean of its divisors is an integer number (405523809).

Almost surely, 2^811047617 is an apocalyptic number.

It is an amenable number.

811047617 is a deficient number, since it is larger than the sum of its proper divisors (1).

811047617 is an equidigital number, since it uses as much as digits as its factorization.

811047617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 811047617 is about 28478.8977490352. The cubic root of 811047617 is about 932.5714539136.

The spelling of 811047617 in words is "eight hundred eleven million, forty-seven thousand, six hundred seventeen".